Pay attention to the use of pesticides , especially in the rainy season. In order to ensure the efficacy of pesticides, the following points must be noted when using pesticides during the rainy season:
First, clever choice:
On the one hand, it is necessary to pay attention to the selection of highly systemic pesticides, such as dimethoate, omethoate, monocrotophos, methamidophos, phosphonamine, etc. These pesticides can be quickly transmitted to the plants after being absorbed by the stems and leaves of the crops. The effect of the site is less affected by rainfall; 1605, methyl 1605, trichlorfon, anti-carbocarb, quetiapine, chlorbenzuron, fenvalerate, green lactate, dexamethasone and other pesticides, although not It has a strong absorption and anti-scour ability on the surface of the crop, so it is also suitable for application in the rainy season. When applied to the crop for 2 hours, the leaves will produce a systemic conduction; after the application of the phosphonamine, it can quickly enter the interior of the plant. About 50% of the dose enters the plant tissue 1 hour after application; half an hour after the green milk spray After the tricyclic azole sprayed for 1 hour, it had no effect on the efficacy. On the other hand, it is necessary to pay attention to the selection of quick-acting pesticides with strong knockdown force, such as phoxim, dichlorvos, omethoate, anti-èšœå¨, 速 å¨, ç å¨, ç多å¨, 广克å¨, æ–°çå¨, cotton boll, jingling, Xinguang 1 and pyrethroid pesticides. After the application of such pesticides, the prevention and control of pests and diseases can be quickly exerted, thereby avoiding or reducing the leaching of the medicament by rainwater. According to some data, the aphids on the crops can be killed in a few minutes after the application of the anti-Suiwei; the rice pests are controlled by the mixed-killing, and most of the pests fall into the water a few minutes after the application.
Second, clever mixing:
That is, an adhesive is added to the medicament to enhance the adhesion of the pesticide on the stems and leaves of the crop, and the control effect is improved; soy flour, polyvinyl alcohol, skin glue and the like are commonly used adhesives.
Third, smart application:
The rainy season is often the most common season for various field crops, fruit trees, vegetables and other pests and diseases. When applying pesticides, it is necessary to pay attention to spraying in the rainless period; under normal circumstances, if it is rained within 24 hours after spraying, it should be re-sprayed once, and the spraying concentration should be appropriately reduced during heavy spraying.
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